It was on one of my SBRs but wasn't used much beyond zeroing a few years ago. The A2 flash hider is installed with a shim instead of a crush washer for suppressor alignment.
The receiver itself is a WMD NiB-X upper receiver with factory FDE cerakote. The barrel is a 11.5" Faxon Gunner Series barrel, with 8" twist, 5.56NATO chamber, and mid-length gas system with Faxon 0.625 gas block. The other parts included are: Troy Alpha 9" Battle Rail with FDE and ODG 'squid grip' inserts and the one picatinny accessory rail shown; TiN coated Brownell's bolt carrier group; Magpul dust cover; Strike Industries FDE forward assist and charging handle; Magpul FDE flip-up iron sights; Emissary Development FDE picatinny handbrake, picatinny sling loop, and an Aimpoint Comp ML2 in an American Defense AD-68 QD mount.
$800 for the upper itself or $1100 with optic and mount. I do have a Sons of Liberty Gunworks pistol lower (rebel stripes stamped) I can include to make this a complete pistol length AR for another $400.